Printing-plate and method of making the same



w.1. YEOELL.

PRINTING PLATE AND METHOD OF MAKING THE SAME.

APPLICATION FILED 0502,1920.

1 379, 432. Patented May24,1921..

lyJ. I

V I l g g'w $-4 \Fit the aforesaid earlier WILLIAI J. YEOELII, OI

PHILADELPHIA, PENNSYLVANIA, ASSIGNOB TO J'OEN s'roe'nm s'roxnaorrnrnannnrnm, rmmsrnvmm.

WG-PLATE AND 1,399,432. Original application .flled April as,

To all whomzv may concern:

Be it known that I, WILLIAM. J. Ynonnn, a citizen of the United States,and resident of Philadelphia, in the county of Philadelphia and State ofFe lvama, have mvented certain new and use Improvements inPrinting-Plates and Methods of Making the Same, of which the followingis a specification.

This invention relates to molded printing plates and method of makingthe same and the present case is a d1v1s1on of my application Serial No.93,493, filed April 25, 1916, and is also in the nature of animprovement on the printing plate disclosed in my prior applicationSerial No. 784,456, filed August 12, 1913.

In said earlier application Serial No.

784,456 I set forth the use of a synthetic 2o resinous material, in thenature of phenolic condensation products, in the manufacture of moldedprinting plates. Therefore, such claims as relate .to printing platesand to the method of making the same, and are generic to the presentdivisional application and to application, Serial No. 784,456, areincorporated in the latter, while the claims herein are directed toimprovements on the printing plate'originally disclosed in said earlierapplication Serial No. 784,456.

In carrying out the presentinvention I make my improved printing platefrom a composite structure which includes, as a component part, asynthetic resin in the nature of a phenolic condensation made with aphenolic condensation product,

as a constituent, will embody the desired features of strength,durability, lightness of weight and resistance to acids and printingressures and the wear and tear encountered in handling andtransportation.

In the preparation of my printing plates I'prefer to employ inconjunction with the phenolic condensation product, fillers of variouscharacter,

Specification of Letters Patent.

1918, Serial No. 98,498. Divided and this application filed December 2,

1920. Serial No. 427,881.

product, such for example, as that commerciallyA as for example suchheat IETHOD OI MAKING THE SAME.

' Patented May 24, 1921.

conducting substances as powdered metal or metallic oxid, to increasethe heat conductivit of the plastlc phenolic condensation pro uct, and Ialso use as strengthening and stiffening materials,

compared with the preparation of electrotypes, stereotypes and similarmetal plates.

Furthermore, by the practice of my method and the utilization of thematerials herem set forth, the printing plates may be molded so as toaccurately reproduce the finest details which appear in an original suchas a type body, etching ,or the like, or an original printing body madeup of a combination of type, half-tone and etching.

With the above recited objects and others of a similar nature in view,my invention consists in the construction, combination and arrangementof parts, and in the improved method set forth in and falling within thescope of the appended claims.

In the accompanying drawing Figure 1 is a plan view of a molded phenolicprinting plate;

Fig. 2 is a view in end elevation showing the plate of Fig. 1 unitedwith a fibrous back such as a block of wood;

Fig. 3 is a view in cross section showing the plate blank material,composed of a layer of plastic phenolic condensation prodnot and abacking sheet of fabric in conjunction therewith, said view alsoillustrating the backing to.which the plate may be united underpressure;

Fig. 4 is a cross sectional view taken through a mold box containing ametal face matrix and showing the manner of molding the printing platefrom the phenolic condensation blank and the fabric sheet of molding boxand the contained plate on the bed thereof; and

Figs. 6 to 10, inclusive are cross sectional views showing modifiedforms of plates.

Before entering into a detailed description of my invention, I willbriefly state that in the manufacture of my molded plate I may use anysuitable apparatus for applying heat and pressure, such for example asthat illustrated inl i 9 of my'aforesaid appli cation, Serial 0.7841,4536, and of which apparatus I have herein merely conventionallyshown the press. I may also employ any suitable matrix or mold, such forexample as that set forth in my application, Serial No. 427,832 filedDecember 2, 1920, as a division of my aforesaid application, Serial No.784,456, and which matrix is shown in cross section in Fig. 4 herein, aslocated in a molding box. This molding box is also shown in theaforesaid earlier application Serial No. 784,456. Therefore, thisinvention is not directed to features of the apparatus, nor to themolding box, nor to the matrix, but'is applicable to improvements in thestructure of the molded plate itself and to the method of making thesame.

Referring now to the accompanyin drawings in detail, and particularly toig. 4,

wherein I have shown enough of the moldbox to give a clear understandmgof the operation of making the plate, the letter A indicates the moldingbox and (B a printing plate matrix clamped therein and having a metallicmolding face C. 1) indicates the lower platen or bed of the press shownin Fig. 5 and E indicates the upper platen thereof, the press platens being shown in Fig. l as closed as in the operation of molding a plate. 7

In making the prlnting plate, I impose u on the metal face of the matrixa plate b ank which is shown in Fig. 3 and comprises a layer 1 of aphenolic condensation product, such as redmanol, referabl having inconjunction therewith a filer or strengthening backing 2 of suitablematerial,

'such as fabric. The blank 1 may contain,

as shown in Fig. land, hardened and set or.

baked to a permanent form. I have found asuitable ressure to range from1000 to 3000 poun s, applied for about from five to twenty minutes andwith a-temperature Lara-tea ranging from 200 to ,420 degrees Fahrenheit,

til

the article may be mailed for use as a print: ing, plate itself or foruse as an original.

in production of stereotypes, the character of my improved compositionplate being especially adapted to the production there from of matricesfor stereotypes; and it will be also noted that the material employedrenders it capable of direct use as a matrix.

itself, being sufiiciently heat-proof for the purposes of stereotyping,if the alloy used be not of a composition having too high a meltingpoint, and my improved plate has such powers of resistance to jars andshocks that it can be transported without suffering the injuries whichhinder the similar utilization of the ordinary flong matrix.

When the plate is to ,be used for printing purposes after mailing it maybe secured to a backin block in the usual fashion, as for example ynails or clamps applied at the printing establishment of the consignee.

If, however, it is intended for use where mailing can be avoided and theweight is, therefore, unimportant, I have found that my improved platecan be formed conveniently in place u on its backing block, simply byappl mg a b ock of fibrous material, such as woo such as is shown at 3(Figs; 2, 3 and 6) to the back of the plate blank, under impression inthe press, with the result that the constituent phenolic condensationproduct such as redmanol, under the heat and pressure employed, unitesthe plate and block in a unitary structure, nicely leveled and capableof withstanding the rough usage of the rinting room, the phenoliccondensation pro uct penetrating the grain or pores of the backingblockas indicated at 4 in Fig. 2.

lit will be noted that in Fig. 3 I have shown the Wooden block 3.positioned above the fabric layer 2 at the back of blank 1 of phenoliccondensation product and which are atter is to form the face or printingsurface of the plate. Inmaking the plate it is possibleto include-thisfiller fabric, for example of crinoline or linen, inthe unitarystructure, and. cement it to the block bythe exudation of phenoliccondensation product under heat and pressure, as will be readilyunderstood, the fabric being sufficiently porous to permit this.

In Figs. 6 to 10 I have shown certain modified forms of printing plates.

In Fig. 6 the backing block 3 has cemented thereto as at 8, a printingplate having its phenolic body portion 9 faced with a metal surface asshown at 10. p

In Fig. 7 the body of the (plate, formed of phenolic condensation prouct indicated at 11, has embedded therein thefabric 12 to form thebacking. If desired this fabric may be provided as a part of the plateblank, being incorporated therein prior to the impression of the blankagainst the matrix. This Fig. 7 also illustrates the application of asheet metal printin and firmly connected with the body of the blankduring the molding operation. This connection can be effected by applng. to the blank which is'to form the o y 11, a suitable fluid, orpaste, or powder, such as a henolic condensation product, which un erheat and pressure wil cause the metal face to adhere to the plate body.

In Fig. 8 the back of. the prmtmg plate, shown at 14 may be composed ofa suitable material, such as felted fabric, or other substances may beused, such as felt paper, and other felting fiber, these being more orless foraminous or porous, so that there is a considerable interenetration of the phenolic condensation pro which will result in .thefirm adherence of the backing to the body of the plate. In said Fig. 6the face 15 of the printing (plate, which is united with the phenollc boy 16, is in the nature of a metallic printing surface, which may beapplied by coating the matrix, prior to the plate molding opera- 36tion, with a paste having a owdered me- ;tallic' content, such as a metalic oxid, that will be transferred to the printing plate during theimpression and molding of the latter and W111 be connected therewith asa 40 metal facing in the form of a fine metal dust evenly distributed. 4

In Fig. 9 I show a up of one or more filler sheets or layers 17 ofpaper, felt or fabric, alternating with layers of thephenoliccondensation product shown at 18. The laminated body may also have ametal facing shown at 19, and this structure provides a strong durableplate of considerable rigidity and free from the tendency to warp orblister.

In Fig. 10 I have shown another modified form of plate wherein hardpolished sheets 20 composed of a suitable filler and phenoliccondensation product alternate with layers 65 of the phenoliccondensation product shown at 21, and the composite sheet thus formed isfaced or coated with a thin paste at one side as at 22, this thin paste,which is to form a printing face being subsequently impressed with typeor other character and at the same operation welded to the platecomposed of the layers 20 and 21.

It will be understood that the constituent parts f the various plates,'5. a, the fiber, phenolic and metal layers or laminations are.

face 13 intimately uct of the plate body 16 laminated plate made unitedunder heat and pressure as described. Furthermore, while I have hereinshown and described uniting the phenolic plate with a wood base orbacking by the inherent penetrating uality of the plastic condensationroduct, do not claim the same specifically erein, as claims specific tothis particular form of the invention are embod ed in my divisionalapplication, Serial No. 427,832

filed Dec. 2, 1920.

What I claim is:

1. A composite printing plate comprising a printing face section of ahard synthetic resm provided with printingcharacters, and anon-resinous,non-flowing backing section permanently united with said face section.

2. A composite printing plate comprising a prlnting face section of ahard infusible phenolic material rovided with printing characters, anonowing backing section, and means for permanently uniting the twosections in an integral structure.

3. A com site printing plate com rising a prmtmg ace section of hardpheno ic materlal provided with printing characters, and a non-phenolicbacking section of yieldmg matenal permanently united with the facesection.

4. composite printing late comprising a prmtmg face section 0 hardsynthetic resmous 'material, and a fibrous backing section, united in anintegral structure with said face section.

5. A composite printing plate having a backing including a layer offibrous material, and a printing plate of hard synthetic resm havingprinting characters formed thereon, and united with the backing by thepenetration of a rtion of the synthetic resin into said bac g. 1

(j). A composite printing unlted laminations of hard synthetic resin,

fibrous material, and metal, one face of said plate having printingcharacters formed theirepincomposite rintin late com risin a laminatedbody ineludi ng a plurality 0% layers of hard synthetic resinousmaterial alternating with a plurality of strengthening or filler sheetsembodying non-resinous material, one side of said laminated sheet beingprovided with a printing face.

8. The herein described method of making a printing plate whichcomprises placing a blank of plastic synthetic resin against the moldingface of a matrix, placing a layer of non-flowing material against theplastic back and then subjecting the assembled parts to heat andpressure to mold and harden the plastic material and form a printingface thereon and unite the same in an integral structure with a layer ofnonflowing material.

a printing plate which comprises placing a late comprising 9. The hereindescribed methodof making blank of lastic synthetic resin against themolding ace of a matrix, placing a layer comprising fibrous materialagainst the plastic blank, and then subjecting the assembled parts toheat and pressure to mold and harden the plastic 'material and form aprinting. face thereon and to unite the same in an integral structurewith the fibrous in en The herein described methed of making e printingplate which eempiieee formavenee ing a laminated body of layers ofplastic synthetic resin, fibrous material and-metal and then subjectingsuch laminated structure to heat and pressure against a matrix to unitethe layers in an integral body and to rovide such body With'a printingface.

igned at Philadelphia, in the county of Philadelphia and State ofPennsylvanie,

this 22nd day of November, A, D, 1%20.

WILLIAM J, YEQELL.

